Spring、Hello AOP

AOP 概念：/article/2506146.html

AOP 所使用到的jar 包：

aspectjrt.jar

common-annotations.jar

aspectjweaver.jar

cglib-nodep.jar

commons-logging.jar

spring.jar

1.在beans.xml中配置AOP的命名空间和Context的命名空间，同时打开AOP注解开关：

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context/"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/context/ http://www.springframework.org/schema/context/spring-context-3.1.xsd"> 
<aop:aspectj-autoproxy />
</beans>

2.新建PersonIService和PersonServiceBean :

public interface PersonIService {
public void save();
public void update();
public String getObject(String name);
}

public class PersonServiceImpl implements PersonIService {

@Override
public void save() {
System.out.println("这是一个Save方法！");
}

@Override
public void update() {
System.out.println("这是一个Update方法！");
}

@Override
public String getObject(String name) {
System.out.println("get方法获取对象= "+name+" 的对象");
return "返回了"+name;
}
}

3.新建AOP拦截类：

// @Aspect 标注这个类是一个切面
@Aspect
public class MyInterceptor {
@Pointcut("execution (* cn.raffaello.service..*.*(..))")
private void anyMethod(){} // 声名一个切入点，声名方式比较奇特

@Before("anyMethod()") // 定义前置通知
public void doAccessCheck(){
System.out.println("前置通知");
}
}

4.在beans.xml中分别注入PersonService和MyInterceptor:

<bean id="myInterceptor" class="cn.raffaello.aop.MyInterceptor" />
<bean id="personIService" class="cn.raffaello.service.impl.PersonServiceImpl"/>

5.测试代码：

public class springTest {
private PersonIService personIService=null;
@Before
public void init(){
ApplicationContext context=new ClassPathXmlApplicationContext("beans.xml");
personIService=(PersonIService)context.getBean("personIService");
}
@Test
public void test() {
personIService.save();
}
}